This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Desenvolvedor Frontend Sênior based in Brazil. This is an opportunity for a Senior Frontend Developer to build high-quality, responsive user interfaces for medium- and large-scale digital projects. You will transform wireframes and discovery requirements into robust, scalable frontend solutions. The role covers implementation, unit testing, backend service integration, deployment support, and production readiness. You will work closely with Backend, QA, and support teams throughout the development lifecycle. Beyond delivering features, you will contribute to knowledge sharing and help ensure stability during the post-release hypercare period. The position is fully remote and offers the opportunity to work in a collaborative, agile environment on challenging technology initiatives.